Strap for Seamaster Aqua Terra 150M Co-Axial 39.2 Yellow Gold / Silver

The lug width of the 2603.30.37 is 20mm, measured center-to-center of the spring bar attachment holes. This dimension is the standard for watches of approximately 39mm in diameter and is essential to ensure proper installation of aftermarket straps. A tolerance of ±0.3mm is still acceptable, but we always recommend verifying with precision before purchase.

For an Aqua Terra in yellow gold, genuine alligator represents the finest choice: the natural texture of the scales and the patina that develops over time further amplify the elegance of the precious metal. A noble alternative is Japanese shell cordovan, which combines superior durability with a refined patina. For pure sportiness, vegetable-tanned calf in cognac or dark brown tones maintains versatility without aesthetic compromise.

Strap replacement requires a specific tool to push out the spring bar: position the watch on a soft surface (felt), locate the small guide hole on one side of the lug, insert the tool and gently push the spring bar. Once removed, slide off the old strap and insert the new one paying attention to orientation. We recommend avoiding hammers or improvised tools, which risk scratching the yellow gold.

Yes, provided the strap respects the 20mm lug width. The important thing is to choose an artisanal quality strap, made with noble leather and sewn with solid technique, so that durability is comparable to the rest of the piece. Compatible aftermarket straps do not affect Omega's warranty and allow great aesthetic versatility, ranging from formal to sporty contexts without changing watches.

A noble leather strap, with vegetable tanning or genuine alligator, can last 5-10 years with routine maintenance (gentle cleaning, drying after humidity exposure, avoiding prolonged immersions). Shell cordovan tends to last longer thanks to superior fiber density. The lifespan also depends on frequency of use and climatic conditions: in humid environments, the strap ages more quickly but acquires a fascinating patina.